Nonlinear quantum mechanics allows better cloning without signalling

Gedik, Zafer and Çakmak, Barış (2012) Nonlinear quantum mechanics allows better cloning without signalling. (Submitted)

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We present a nonlinear generalization of quantum mechanics where one can copy arbitrary pure states with fidelities higher than those of the quantum cloners. Weinberg's nonlinear quantum mechanics has been criticized for its possible implications for superluminal communication. We demonstrate that universal symmetric cloners can make better copies than standard quantum ones and yet they do not violate the no-signalling principle. If linearity constraint is added, we show that for a given fidelity there is a unique cloner which can be written down explicitly.

Item Type:Article
Subjects:Q Science > QC Physics > QC170 Atomic physics. Quantum theory.
ID Code:20495
Deposited By:Zafer Gedik
Deposited On:06 Dec 2012 16:32
Last Modified:06 Dec 2012 16:32

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